CN104051811B - A kind of floating charge method and system of battery - Google Patents
A kind of floating charge method and system of battery Download PDFInfo
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- CN104051811B CN104051811B CN201410288092.8A CN201410288092A CN104051811B CN 104051811 B CN104051811 B CN 104051811B CN 201410288092 A CN201410288092 A CN 201410288092A CN 104051811 B CN104051811 B CN 104051811B
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- floating charge
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- 238000007667 floating Methods 0.000 title claims abstract description 34
- 238000000034 method Methods 0.000 title claims abstract description 27
- 230000010354 integration Effects 0.000 claims description 7
- 230000005611 electricity Effects 0.000 claims description 6
- 238000000205 computational method Methods 0.000 claims description 3
- 238000005259 measurement Methods 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims description 2
- 239000002253 acid Substances 0.000 description 7
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 3
- QSNQXZYQEIKDPU-UHFFFAOYSA-N [Li].[Fe] Chemical compound [Li].[Fe] QSNQXZYQEIKDPU-UHFFFAOYSA-N 0.000 description 3
- 229910052698 phosphorus Inorganic materials 0.000 description 3
- 239000011574 phosphorus Substances 0.000 description 3
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 229910052744 lithium Inorganic materials 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 229910052493 LiFePO4 Inorganic materials 0.000 description 1
- ZSYNKHJUSDFTCQ-UHFFFAOYSA-N [Li].[Fe].P(O)(O)(O)=O Chemical compound [Li].[Fe].P(O)(O)(O)=O ZSYNKHJUSDFTCQ-UHFFFAOYSA-N 0.000 description 1
- 229910052924 anglesite Inorganic materials 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 230000002427 irreversible effect Effects 0.000 description 1
- 230000003446 memory effect Effects 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/44—Methods for charging or discharging
- H01M10/448—End of discharge regulating measures
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/4285—Testing apparatus
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Secondary Cells (AREA)
Abstract
The invention discloses the floating charge method and system of a kind of battery, by voltage measuring apparatus, current measuring device, battery data is measured, discharge and recharge is controlled by control module and two-way inverter or two-way DC/DC, when battery is in floating charge holding state, judge that the SOC of battery is whether in the range of the circulation volume set, cycle charge discharge is controlled according to floating charge lower limit, so that battery or set of cells are in line states all the time, it is adaptable to UPS, EPS etc. need battery to keep the occasion of online quickly response.
Description
Technical field
The invention belongs to battery applications field, specifically be the floating charge method and system of a kind of battery.
Background technology
Along with the constantly progressive of society and the further raising of automaticity, increasing applications EPS should
The power-supply devices such as urgent telegram source and UPS uninterrupted power source.Once meeting unexpected natural disaster or other emergencies, civil power stops
Only power supply, these power supplys just can be to fire fighting device, security facility, medical equipment, emergency lighting, important server, automatic
Change the power supplies such as control module, it is ensured that the continuous firing of some important equipment.Due to patient power failures of some equipment such as computers
Time is the shortest, and the most most UPS and EPS needs to accomplish seamless switching, in order to be able to reach such target major part electricity
Battery within source is all to be directly connected on bus from not turning off, and therefore these batteries are all chronically at the state of a kind of floating charge.
But how battery is carried out floating charge and be always a difficult point, with valve-control type lead-acid accumulator the most frequently used in UPS be
Example.The UPS lead-acid battery of certain unit uses the time less than 2 years, and capacity attenuation, just more than more than 50%, is shown to be this through research
Caused by the lead-acid battery floating charge of normal phase of company UPS.Because accumulator is under long-term floating charging state, only charges and do not discharge, gesture
The plate that must cause accumulator is passivated, and makes accumulator internal resistance increase, and capacity declines to a great extent, thus causes accumulator to use
Life-span declines.It addition, the selection of lead-acid battery float charge voltage should be adjusted with the state of battery, too high float charge voltage can
Can cause and overcharge, affect the service life of battery；Too low float charge voltage can cause battery oxygen combined efficiency to reduce, cathodic reduction
Not thorough, PbSO4Long time integration forms irreversible crystal, and negative plate is gradually passivated, and ultimately results in capacity and significantly decays.Lithium from
Sub-battery equally exists the minority lithium battery Performance comparision of resistance to floating charge such as the problem that long-term floating charge capacity declines, only LiFePO4
Good.
Existing technology typically carries out floating charge with fixing float charge voltage to set of cells, and problem is the optimum floating charge of set of cells
Voltage and ambient temperature etc. are because have close ties, and therefore when optimum float charge voltage change when, the method likely results in electricity
The rapid decay of tankage.If to be adjusted according to the state of battery, need to consider that other factors such as temperature are to floating
Charging voltage compensates calculating, and due to problems such as battery with two side terminals, the computation model of float charge voltage is difficult to set up, and is difficult to
Practical.
Summary of the invention
The present invention is for overcoming above-mentioned technological deficiency, it is proposed that the floating charge method and system of a kind of battery, the method and system
Need not set accurate float charge voltage, control cycle charge discharge in battery scope near full power state.The method both will not
Causing battery life decay (using memory-less effect battery), overcome again self-discharge of battery simultaneously, float charge voltage is difficult to determine
And the problem that battery is chronically at charged state, it is adaptable to all of battery not having memory effect.
For realizing above-mentioned technique effect, technical scheme is as follows:
A kind of floating charge method of battery, it is characterised in that:
When battery is in floating charge holding state, it is judged that whether the SOC (battery charge state) of battery is in the circulation set
In range of capacity；
If the SOC of battery is in the range of the circulation volume set, then with 0.1c(i.e. 0.1 times of battery rated current) put
To floating charge lower limit, (floating charge lower limit can be arranged as required to electricity, but fills the shallow scope put without departing from shallow, and i.e. floating charge lower limit is minimum should not
Less than 90%SOC, the best closer to 100%SOC), it is further continued for after being discharged to floating charge lower limit charging to 100%SOC, then with 0.1 c
Cycle charge discharge (cycle charge discharge should above-mentioned shallow fill shallow putting in the range of)；Charging and discharging currents can less than 0.1c and the smaller the better,
Should arrange using the minimum current that software and hardware can accurately be measured as reference.
If the SOC of battery is not in the range of the circulation volume set, then with the electric current of 0.1 c(or less) electric current fills
Electricity, to 100%, is further continued for 0.1C cycle charge discharge.
When above-mentioned battery is set of cells, equally applicable said method.
In order to ensure the safety of battery or set of cells, SOC should be using the ceiling voltage of monocell as calibration.Such as phosphorus
Acid lithium iron battery is full of i.e. SOC for 100% using 3.6v as battery, if set of cells then should be with cell in set of cells
The highest that single battery voltage of voltage is as calibration.
Therefore it is required that must there be the measuring circuit for gathering voltage on hardware, as SOC calibration and battery protection.
The calculating of SOC utilizes ampere-hour integration method, it is also possible to be simultaneously introduced the methods such as voltage rectification and triumphant Kalman Filtering.
For realizing said method, the floating charge system of the present invention includes voltage measuring apparatus, current measuring device, control module
With two-way inverter or two-way DC/DC(DC converter)；Voltage measuring apparatus, current measuring device are respectively with battery even
Connecing, then voltage measuring apparatus, current measuring device are respectively connecting to control module, control module connection timer and two-way inverse
Become device or two-way DC/DC, two-way inverter or two-way DC/DC are connected with whole set of cells or battery.
Described voltage measuring apparatus and current measuring device precision should be tried one's best height.
Described current measuring device and time set (can be external timer, it is also possible to be that control module is integrated
Timer) precision be largely fixed the precision of SOC.
Described controlled two-way inverter is the most accurate more good to the control of electric current.
Described two-way inverter or two-way DC/DC require to have constant current mode and control accuracy relatively Gao Wen at low currents
Ripple is less.
Each equipment in described system both can use existing equipment, it is also possible to designed, designed.
The workflow of described system is:
Step one, voltage measuring apparatus gathers the magnitude of voltage of each monocell in battery or set of cells and uploads to control
Module；
Step 2, current measuring device gathers total current value and uploads to control module；
Step 3, between the time that control module gathers electric current twice before and after calculating according to the time data that timer provides
Every；
Step 4, the time interval meter that the total current value that control module utilizes current measuring device to upload obtains with step 3
The computational methods calculating battery or the SOC of set of cells, SOC use ampere-hour integration method auxiliary battery voltage to be modified (such as phosphorus
Acid lithium iron battery voltage reaches 3.6v then its SOC and is considered 100%), give two-way inverse according to the SOC value that battery or set of cells are current
Become device or two-way DC/DC assigns discharge and recharge order；
The discharge and recharge order that step 5, two-way inverter or two-way DC/DC assign according to control module is to battery or battery
Group carries out discharge and recharge.
It is an advantage of the current invention that:
1, in the present invention, battery or set of cells are in line states all the time, it is adaptable to UPS, EPS etc. need battery to be maintained at
The occasion that line quickly responds；
2, in the present invention, it is not necessary to set float charge voltage, float charge voltage set suitable difficulty, as arranged, improper have can
Battery capacity can be caused to decay rapidly；
3, in the present invention, battery or set of cells will not be made the most only to be in charged state, be conducive to protecting battery；Simultaneously
Little scope shallow fills shallow putting and will not reduce battery life；
4, the discharge and recharge logical method of the present invention is applicable to most of charge-discharge system, it is possible to directly at existing system
On software is arranged accordingly, therefore the present invention to realize cost relatively low.
Accompanying drawing explanation
Fig. 1 is the control flow chart in the embodiment of the present invention；
Fig. 2 is the hardware elementary diagram in the embodiment of the present invention.
Detailed description of the invention
The present invention is further described with embodiment below in conjunction with the accompanying drawings.
A kind of floating charge method of battery that the present invention implements, its control flow is shown in Fig. 1, and first control module confirms that UPS does not has
Being operated in emergency service state, system proceeds to floating charge holding state.Judge the SOC of battery or set of cells, if 100%
Then it is discharged to floating charge lower limit with 0.1c, but lower limit can manually arrange and should not fill the shallow scope put beyond shallow, puts to lower limit
After be further continued for 0.1C cycle charge discharge.If the SOC of battery or set of cells is not 100%, then charge to 0.1c electric current
100%, it is further continued for 0.1C cycle charge discharge.
Above-mentioned ups can be monocell can also be set of cells.
In order to ensure the safety of battery or set of cells, SOC should be using monocell ceiling voltage as calibration, such as phosphoric acid
Lithium iron battery is full of i.e. SOC for 100% using 3.6v as battery, if set of cells then should be with cell electricity in set of cells
Press that the highest conduct calibration.
Therefore it is required that must there be the measuring circuit for gathering voltage on hardware, as SOC calibration and battery protection.
The calculating of SOC utilizes ampere-hour integration method, it is also possible to be simultaneously introduced the methods such as voltage rectification and triumphant Kalman Filtering.
For realizing said method, as in figure 2 it is shown, a basic hardware principle structure, including voltage measuring apparatus, electric current
Measurement apparatus, control module and two-way inverter or two-way DC/DC(DC converter)；Voltage measuring apparatus, current measurement
Device is connected with battery respectively, and then voltage measuring apparatus, current measuring device are respectively connecting to control module, and control module is even
Meet timer and two-way inverter or two-way DC/DC, two-way inverter or two-way DC/DC to connect with whole set of cells or battery
Connect.
Described voltage measuring apparatus and current measuring device precision should be tried one's best height.
Described current measuring device and time set (can be external timer, it is also possible to be that control module is integrated
Timer) precision be largely fixed the precision of SOC.
Described controlled two-way inverter is the most accurate more good to the control of electric current.
Described two-way inverter or two-way DC/DC require to have constant current mode and control accuracy relatively Gao Wen at low currents
Ripple is less.
Each equipment in described system both can use existing equipment, it is also possible to designed, designed.
The workflow of described system is:
Step one, voltage measuring apparatus gathers the magnitude of voltage of each monocell in battery or set of cells and uploads to control
Module；
Step 2, current measuring device gathers total current value and uploads to control module；
Step 3, between the time that control module gathers electric current twice before and after calculating according to the time data that timer provides
Every；
Step 4, the time interval meter that the total current value that control module utilizes current measuring device to upload obtains with step 3
The computational methods calculating battery or the SOC of set of cells, SOC use ampere-hour integration method auxiliary battery voltage to be modified (such as phosphorus
Acid lithium iron battery voltage reaches 3.6v then its SOC and is considered 100%), give two-way inverse according to the SOC value that battery or set of cells are current
Become device or two-way DC/DC assigns discharge and recharge order；
The discharge and recharge order that step 5, two-way inverter or two-way DC/DC assign according to control module is to battery or battery
Group carries out discharge and recharge.
Claims (3)
1. the floating charge method of a battery, it is characterised in that:
First, when battery is in floating charge holding state, it is judged that whether the SOC of battery is in the range of the circulation volume set；
If the SOC of battery is in the range of the circulation volume set, then it is discharged to floating charge lower limit with 0.1C, is discharged to floating charge lower limit
After be further continued for charging to 100%SOC with 0.1 C, then cycle charge discharge；Charging and discharging currents is less than 0.1C, can accurately survey with software and hardware
The minimum current of amount is as with reference to arranging；
If the SOC of battery not set circulation volume in the range of, then with the electric current of 0.1 C or less be charged to
100%, it is further continued for 0.1C cycle charge discharge；
Described 0.1C refers to 0.1 times of battery rated current；
Described floating charge lower limit minimum more than or equal to 90%SOC, and less than 100%SOC；
Described SOC is using the ceiling voltage of monocell as calibration；
When above-mentioned battery is set of cells, equally applicable said method.
The floating charge method of a kind of battery the most according to claim 1, it is characterised in that: the calculating of described SOC utilizes ampere-hour
Integration method.
3. realize the floating charge system of method described in claim 1 or 2, it is characterised in that: voltage measuring apparatus, current measurement dress
Put, control module and two-way inverter or two-way DC converter；Voltage measuring apparatus, current measuring device respectively with battery
Connecting, then voltage measuring apparatus, current measuring device are respectively connecting to control module, control module connection timer and two-way
Inverter or two-way DC converter, two-way inverter or two-way DC converter are connected with whole set of cells or battery；
Described time set is external timer, or the timer that control module is integrated；
The workflow of described floating charge system is as follows:
Step one, voltage measuring apparatus gathers the magnitude of voltage of each monocell in battery or set of cells and uploads to control mould
Block；
Step 2, current measuring device gathers total current value and uploads to control module；
Step 3, control module gathers the time interval of electric current according to the time data that timer provides for twice before and after calculating；
Step 4, the time interval calculating electricity that the total current value that control module utilizes current measuring device to upload obtains with step 3
Pond or the SOC of set of cells, the computational methods of SOC use ampere-hour integration method auxiliary battery voltage to be modified, according to battery or
The current SOC value of set of cells assigns discharge and recharge order to two-way inverter or two-way DC/DC；
Battery or set of cells are entered by the discharge and recharge order that step 5, two-way inverter or two-way DC/DC assign according to control module
Row discharge and recharge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410288092.8A CN104051811B (en) | 2014-06-25 | 2014-06-25 | A kind of floating charge method and system of battery |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410288092.8A CN104051811B (en) | 2014-06-25 | 2014-06-25 | A kind of floating charge method and system of battery |
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| CN104051811A CN104051811A (en) | 2014-09-17 |
| CN104051811B true CN104051811B (en) | 2016-09-21 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107508008A (en) * | 2016-06-14 | 2017-12-22 | 中兴通讯股份有限公司 | The charging method and device of terminal |
| CN107139754B (en) * | 2017-05-23 | 2020-11-17 | 江苏东源电器集团股份有限公司 | Charge control strategy for maintenance mode |
| CN107128199B (en) * | 2017-05-23 | 2020-11-17 | 江苏东源电器集团股份有限公司 | Control strategy of direct current charging pile charging management system with multiple contextual models |
| CN107359677B (en) * | 2017-09-05 | 2024-04-12 | 纽福克斯光电科技（上海）有限公司 | Detection device, system and car |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1402375A (en) * | 2002-04-04 | 2003-03-12 | 北京航空航天大学 | Method and device for automatic equilization of charge-and-dischage based on cell dynamic electricity different compensation |
| CN103227489A (en) * | 2013-04-02 | 2013-07-31 | 珠海瓦特电力设备有限公司 | Active type management method and system of valve-regulated sealed lead acid storage battery pack |
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| US8581554B2 (en) * | 2009-07-10 | 2013-11-12 | Schneider Electric It Corporation | Battery charging method and apparatus |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1402375A (en) * | 2002-04-04 | 2003-03-12 | 北京航空航天大学 | Method and device for automatic equilization of charge-and-dischage based on cell dynamic electricity different compensation |
| CN103227489A (en) * | 2013-04-02 | 2013-07-31 | 珠海瓦特电力设备有限公司 | Active type management method and system of valve-regulated sealed lead acid storage battery pack |
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Effective date of registration: 20180424 Address after: 610000, No. 18, West core road, hi tech West District, Sichuan, Chengdu Patentee after: Dongfang Electric Co., Ltd. Address before: Jinniu District Chengdu City, Sichuan province 610036 Shu Road No. 333 Patentee before: Dongfang Electric Corporation |